The development of modern science is great. It makes barbarism no longer able to conquer civilization, mankind conquer nature, and ordinary people also live a good life that even the emperor dares to think...

...But while scientific development, humans need to learn more and more things. If there is no systematic learning and no prior knowledge, many topics will not be able to communicate.

For example, Xiao Heng and the two ladies are like this.

When the girl in white asked what science was, Xiao Heng suddenly didn't know where to start... What science is? Especially how to explain it clearly to an ancient person who had never been exposed to modern education?

Xiao Heng had been brewing for a long time, but did not copy the official explanation on the Internet, but expressed his own understanding: "Thunder and rain, spring, summer, autumn and winter... we went to observe, guess, verify, and finally came up with the truth. This is science."

"Then why are there thunder and rain? Why are there spring, summer, autumn and winter?" Ms. Qin asked curiously.

"Why do you think it rains?" Xiao Heng asked back.

"It shouldn't be that the Dragon King spitting water...?" Miss Qin asked tentatively.

"...Of course not." Xiao Heng sighed.

To explain how to thunder, we must start with "triggering and electricity", while the classic friction-triggering and electricity fur and silk are both there, but there are no rubber rods and glass rods, so this problem cannot be explained for the time being.

But it doesn't need to rain.

The evaporation and condensation of water can be observed. Xiao Heng didn't say much, but just took the two ladies to the kitchen. It happened that the kitchen was boiling water and steaming dates, which saved Xiao Heng a lot of effort.

Xiao Heng took a jar and filled it with cold water, and then hung the jar on the steamer. After a while, the outside of the jar was filled with dense water droplets. As the water droplets became larger and larger, gradually the tension on the water surface and the friction between the water droplets and the wall of the jar could no longer resist gravity. Then the water droplets fell one after another, gathering more and more, and finally slipped down from the bottom of the jar.

“…”

The two ladies looked serious.

"Is this why it rains?" asked the girl in white.

"Yes." Xiao Heng nodded.

"Is there such a jar in the sky?" The girl in white looked at Xiao Heng curiously. After all, Xiao Heng came from "the sky". I think he would understand better what there is in the sky.

"No." Xiao Heng shook his head and explained: "Dust blows into the sky and plays a role similar to the bottom of a jar, and water vapor depends on these dust. We call these dust "condensation nuclei."

"But why does the water condense on these dust...the condensed nucleus?" the girl in white continued to ask.

"Water vapor evaporates to the sky. As the temperature drops, the water content of the air decreases. After encountering the condensation nucleus, the excess water will condense into small water droplets and fall down like this, and eventually become bigger and bigger and bigger and fall on the ground."

Xiao Heng continued to explain.

"But why is the temperature in the sky low? Why does the water content decrease when the temperature is low? Why does the water need to be condensed after it encounters condensation nucleus?"

The girl in white seemed to have been opened up a new world, transformed into a hundred thousand whys and kept asking questions.

"The higher the air, the thinner the air, and the lower the ability to preserve heat. When the temperature is low, the gap between molecules becomes smaller and the dissolution ability is naturally reduced. The supersaturated solution or gas is in a metastable state. Because the initially generated new phase body is actively small and has a large specific surface and surface Gibbs function, the new phase is difficult to form and causes various supersaturation phenomena... The emergence of condensation nuclei reduces the difficulty of forming new phases."

"What's not as good as...function?" As the knowledge continued to deepen, the two girls finally struggled to hear.

"Take it slowly." Xiao Heng smiled, "No matter what macro phenomenon is, it will eventually be refined into the micro field. So... take it slowly."

“…”

When a Chinese finds that he cannot understand Chinese, the gap in knowledge will make people involuntarily feel admiration. This emotion is called... Unclear and sharp.

Just like why ancient literati had to engrave ancient texts one by one? In the beginning, it must be because of the difficulty of writing books and biography, and they needed to engrave words one by one on bamboo slips, so they had to use the most concise language, so naturally there was no room for punctuation.

With the development of the times and the progress of productivity, this habit of being simple and simple should have been abandoned for a long time. However, because of the power of habits or the selfishness of oneself, it has formed a situation where people who have not systematically learned classical Chinese and cannot even make a sentence pronounced, which artificially increases the difficulty of spreading knowledge.

Many literati are not ashamed but proud, and feel proud because others cannot understand it.

Both ladies are well-educated and well-educated, and they also have some understanding of this situation among literati.

However, Xiao Heng was completely different from these people. No matter what problem he said, he used the simplest and most simple language to make them understand. However, as the knowledge became more and more difficult for the two ladies to understand what they spit out from Xiao Heng's mouth.

This feeling of gradually entering the unknown realm is something the two ladies have never experienced before.

"It's like this when it rains, and it's like thunder. Everything in the world has its own reasons. Discover it, study it, and use it... This is the charm of science and the inevitable path to realize the development of human civilization."

Speaking of this, Xiao Heng's tone was a little ridiculous: "Confucian classics teach the principles of how to be a human being, but only knowing how to be a human being cannot promote civilization... Besides, most people in the world talk about the principles that are beneficial to themselves, and abandon the principles that are not beneficial to themselves, not to mention the parts that are harmful to them."

"What the young master said," Miss Qin seemed to be quite touched. During the period when the Qin master was in trouble, she had seen all the warmth and coldness of the world.

"If the young master's theory is spread, those corrupt scholars will make a fuss." The girl in white said with some concern.

"Yes." Xiao Heng smiled, "So I said, this is risky."

"Young Master, don't worry too much. The little girl can't repay her two life-saving graces. My father's affairs need to be made advice... How can I care about such a great grace?" Miss Qin smiled, "Besides, the science of the young master is really fascinating. If I am not a daughter, I must study hard with you."

"Why can't women learn?" Xiao Heng raised his eyebrows, "People are born equal. This is true for both men and women."

"Okay!" The girl in white slapped the table suddenly, "If it were me...hum, I will definitely, hum."

"..." Xiao Heng was confused. The girl in white said half and swallowed half, and then half and half. Only if she could understand it would be a ghost!

"Uh...hehe." The girl in white suddenly found that Xiao Heng looked confused. Miss Qin next to her covered her mouth and laughed secretly. Then she realized that her grammatical disease... She flattened her mouth and cleaned up her emotions. The girl in white said softly:

"My surname is Zhao."

"Oh, it's Miss Zhao, hello." Xiao Heng bowed... This time he was not a boxing ceremony. He learned some basic etiquette after so long.

“…”

The two ladies looked at each other.

This is a very smart man, why does he become slow when he gets to such a place?

"What? Did I say something wrong? Or did I learn the etiquette wrongly?" Xiao Heng asked in confusion, "Hey, you two are talking."
Chapter completed!